A D.A. spokeswoman said she did not believe prosecutors had found fault with any on-duty police shooting since Seth Williams became D.A. in 2010

PHILADELPHIA — In the space of eight months, Philadelphia Police Officer Larry Shields twice made the decision to shoot.

The first time, Shields shot and wounded a man who he said had pointed a Glock at him in a North Philadelphia house. The wounded man has since sued the city, but he was arrested after the encounter and police Internal Affairs and the District Attorney's Office have backed Shields.